en_tn_condensed/act/04/24.md

General Information:

Speaking together, the people quote a Psalm of David from the Old Testament. Here the word "they" refers to the rest of the believers, but not to Peter and John.

they raised their voices together to God

To raise the voice is an idiom for speaking. "they began speaking together to God" (See: rc://en/ta/man/translate/figs-idiom)